A solution to NOT drill your track forks and have a normal front brake nonetheless

Star nuts may dig into the steerer, but they also place all the load on a much smaller area.
Don't underestimate the forces and vibration that heavy braking will place on each edge of each star nut fin.

As said, those forces would be redirected into a vertical pull at the starnut by making use of a short 'stem' that sinks into the steerer tube snugly.

Not to mention the threads of the securing bolt, which will only be holding by a smaller number of the threads an expanding wedge bolt will.

Anyway, steel bolt/thread combinations of >= M6 and a thread length of 10mm are nothing to worry about in this case I guess.

But also, don't forget that pretty much ALL aftermarket wedges AND starnuts will be the wrong size, as the base of most steerers on older track bikes will have smaller internal diameters to the top of the steerer.
Some cast crowns have very little space inside, which again means that the braking force stress will need something with higher strength inside than starnuts.

IMO of course. :]

That *is *a good point. The advantage of starnuts is here that they do not have to fit exactly as they can bend a bit, and some nice hammer strokes should get them in.
This diameter is more an issue with regard to the "stem" piece outlined above.
Either this stem is designed slightly conical, or it might be worth finding out if this diameter is about the same everywhere or inside what range it differs.

jetski